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作者:

Yan, Zhi-Wei (Yan, Zhi-Wei.) | Bai, Yu-Lei (Bai, Yu-Lei.) (学者:白玉磊) | Ozbakkaloglu, Togay (Ozbakkaloglu, Togay.) | Gao, Wan-Yang (Gao, Wan-Yang.) | Zeng, Jun-Jie (Zeng, Jun-Jie.)

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SCIE

摘要:

The polyethylene naphthalene (PEN) and polyethylene terephthalate (PET) fibers have a tensile rupture strain of over 5%, and hence they are referred to as large-rupture-strain (LRS) fiber reinforced polymer (FRP) materials. Their large rupture strain characteristics may contribute to significant improvement of the impact resistance of reinforced concrete (RC) structures. This study investigates the strain rate effect on LRS FRP-confined concrete through Split Hopkinson Pressure Bar (SHPB) test. Results revealed that LRS FRP-confined concrete specimens exhibited superior impact resistance behaviors compared to the counterpart confined with CFRP composites when subjected to a single impact. The critical strain, compressive strength and toughness of the LRS FRP-confined concrete specimen increased with increasing strain rate. Due to the large rupture strain characteristics, the LRS FRP-confined concrete specimen virtually had no visible damage after a single impact. To study the damage evolution mechanism of concrete, the specimens were impacted for multiple times with the same energy until the failure of the specimen. Due to progressive concrete damage, the dynamic compressive strength and toughness experienced a decrease during multiple impacts. These findings might promote the application of LRS FRP materials in the field of impact resistance design of RC structures as a promising external jacketing material.

关键词:

LRS FRP-confined concrete Repeated impact SHPB Strain rate effect

作者机构:

  • [ 1 ] [Yan, Zhi-Wei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 2 ] [Bai, Yu-Lei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Ozbakkaloglu, Togay]Texas State Univ, Ingram Sch Engn, San Marcos, TX USA
  • [ 4 ] [Gao, Wan-Yang]Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai, Peoples R China
  • [ 5 ] [Zeng, Jun-Jie]Guangdong Univ Technol, Sch Civil & Transportat Engn, Guangzhou, Peoples R China

通讯作者信息:

  • 白玉磊

    [Bai, Yu-Lei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China

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来源 :

COMPOSITE STRUCTURES

ISSN: 0263-8223

年份: 2021

卷: 272

6 . 3 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:8

被引次数:

WoS核心集被引频次: 19

SCOPUS被引频次: 26

ESI高被引论文在榜: 0 展开所有

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